一种全光纤型窄带梳状滤波器的特性分析  

Analysis of characteristics of all-fiber comb-filter with narrow band width

作　　者：鲁怀伟[1] 周玲 章宝歌 罗冠炜[1] 

机构地区：[1]兰州交通大学数理与软件工程学院,甘肃兰州730070 [2]兰州交通大学光电技术与智能控制教育部重点实验室,甘肃兰州730070

出　　处：《光学技术》2005年第4期608-610,共3页Optical Technique

基　　金：国家自然科学基金资助项目(10172042);兰州交通大学"青蓝"工程资助项目(50475109)

摘　　要：分析了由双光纤定向耦合器组成的梳状滤波器的透射特性。根据传输矩阵,推导出了该滤波器的输出光谱与有关参数之间的关系式。分析结果表明:该滤波器具有法布里_珀罗腔多光束干涉的特点,是一种窄带宽梳状滤波器;耦合器的耦合系数与法布里_珀罗腔中的反射率类似,通过控制耦合系数可以调节滤波器的通带半宽度、消光比、隔离度、输出光强等。The transmission characteristics of all-fiber filter composed of double fiber directional couplers were studied. The mathematical formulations for the relationship between output spectrum and filter parameters were deduced by the transmission matrix. The analytical results show that the filter has the characteristics of multi-beam interference of Fabry-Perot cavity, and it is a narrow-bandwidth comb-filter. Coupling coefficient of the coupler is quite similar to the reflectivity of Fabry-Pemt cavity. The half breadth of passband,extinction ratio,wavdength isolation ratio and output power of the filter can be adjusted by changing coupling coefficient.

关 键 词：应用光学 梳状滤波器 光纤方向耦合器 法布里-珀罗腔 

分 类 号：TN253[电子电信—物理电子学]